Rhyming verse from Brian P. Cleary presents the fictional Clip-Clop Elementary School's celebration of "Onomatopoeia Day." Enthusiastic young students make their way from band room ( Rattle! Boom! Twang! ) to the gym ( Whiff! Whack! Swish! ) to the science lab ( Hiss! Spurt! Ding! ) and beyond. Brief back matter offers additional examples of onomatopoeias--words that imitate sounds.